The data file, of a near-infrared spectrum around 900 nm, if opened in a text editor, would look as follows. That is two columns of data – Wavelength is the first column, in nanometers and Intensity is the second column (photon counts, let’s say). The intensity for each color is recorded using a camera. The data in this case is formed by spatially dispersing an input light into its constituent colors (wavelengths of that color). For the uninitiated, a spectrometer is basically a fancy prism with a camera at the rainbow end to take a black and white picture (intensity) of the rainbow. In my lab we use a spectrometer to collect data. I am breaking down the data that I’m going to work with because the things I’m going to talk in this post can be applied to any other data which looks similar – That is, a simple two column data, which when plotted will form a 2D line plot with an x and y-axis.
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